Process for treating crape waste



same time that it breaks up the masses of Patented Sept. 4, 1928.

GEORGES BONNABD, OF LE TOUVET, FRANCE;

earea* rt PROCESS FOR TREATING GRAPE g No Drawing. Application filed April30, 1927,

Among the waste materials sold under the trade name of silk fioss one species which is of far lower value than the average is the waste produced in spinning and weaving crape yarn.

This loss of value may be explained by the fact that crape yarn, which is character-med by the powerful torsion imparted to the original silk thread, produces waste threads which cannot be combed for conversion into chappe. In fact, the characteristic'torsion of the crape yarn prevents the fibres of this yarn from sepa ating under the action or" the comb. the yarn remaining curly and whole, so that all treatment by combing and spinningnvith the object of obtaining a chappe yarn, is rendered impossible.

The present invention relates to a process of treating crape waste to enable the same to be afterwards combed or carded and finally theproduction of a chappe yarn from such waste, the said process being based on the following observations v It crape threads, the extremities of which are free, be subjected to the action of a carding or combing machine, the friction of the needles'ot. the 'carding or combing machine sets up incipient untwist-ing of the cr'ape threads, but only to a very slight extent and quite insufiicient to liberate the fibres oi which the thread is composed If short crape threads with free extremities are exposed to the action of boiling water, the threads will untwist and thus revert to their primitive condition. It the ends of the crape threads are not free, the action of the boiling water is similar but since the solodity of the ct:- tremities prevents the threads from untwisting, they will remain twisted and assume a peculiar aspect known as craps. It the threads treated with boiling water are free at the extremities, but are too long, 'untwisting is rendered impossible by the folding and tangling of the threads upon themselves, which tangling, in fact, entirely orevents the extremities from becoming tree. I

According to the present invention the crape waste is first passed through an opener tobreak up the compact masses always fo nd in waste of this kind. This operation can be performed in well known manner byany suitable means known inthe art such as with the so-called waste-opening machines. At the waste, the opener breaks up the longthreads present in the waste. The type of the open- 4 after treatment.

Serial No. 188,049, and. in France May 10, less.

ing machine selected and the manner of working the same exert" a considerable influence on the length of the individual threads obtained These two factors a low the length of the thread elements obtained to be regulated approximately.

After passing through the opener, the waste is put through a machine for the purpose of completely separating the threads and arranging them in parallel" lines. 'This parallelism of the'threads can be eliected either by means of the clothing of the carding machine or therneedles' of the comb. The carder and comb may alsobe employed in succession, or vice versa, or'the waste may be treatedvin the various carding machines constituting a set. Though the choice of the machine and the method of working it may be varied the result to be obtained by the treatment will always be the same, namely that the threads or which the waste is com posed are obtained as a sliver or ribbon, completely separated and lying parallelto each other. As already mentioned above, this cardingprocess eitects an incipient'untwisting of such of the threads'as are free at the threads, the waste can be brought into such a'condition that the fragments are short enough to enable them to be untwisted by the boiling process. p

It may happen that the threads resulting fromthe two preceding operations are still too long to untwistsatisfactorily by boiling in which case the length of these threads can be'shortened to any desired extent by cutting up the sliver or ribbon into equal sections by means of cutters, or shears, of any suitable kind. The crape threads of which {the sliver or ribbon are composed are'thus separated into portions the maximum length of which corresponds'to the length oi the cut sections,

and the extremities of these portions will be free, by reason of the previously efii'ected parallelism of the threads. A good length to give these portions is about t centimetres, but this may vary and may be appreciably exceeded. This method of operating permits obtaining crape threads in portions which are not unduly long as well as shorter lengths of thread. The sliver or ribbon may be cut into equal lengths prior tocarding, by operating, for example, on the sliver produced by an opener of the Garnett type. The operations may'also be performed in the following order: opening, carding, cutting, cardminimum of waste.

The shortened fragmentsof crape threads having begun to untwist in the course of the preceding operations and being completely separated from each other, are then treated with boiling water, which operation should preferablybe carried out with the following precautions.

The portions of crape threads must not be introduced or kept in boiling water in a compact/mass, but in a divided state, so that the untwisting of the threads may not be impeded by their compact condition but, on the contrary, be facilitatedby their agitation during the boiling process.

7 '(b) While the boiling water scours the filaments of the silk, and thus assists the untwisting of the crape threads, the action is assisted by adding a little soap to the water. If the operation has been properly performed, the untwisting of the. threads, after 30 to 40 minutes boiling, will haveadvanced sufiiciently to allow the waste to be taken out, rinsed-and dried.

The. untwisted crape threads no longer present the appearance of yarn, the untwisting having liberated'the silk fibres of which they are composed. When dry, these fibres form a slightly matted mass of white waste, which must be carded in order to separate the fibres from each other. The resulting product is a somewhat short-staple chappe, which is -is'small for the same reason'as the silk waste,

as well as to all other-waste crape threads, of whatever material they may consist.

What I claim is 1. A process for treating crape waste material which comprises running said waste through a waste opening machine to break up the threads into substantially equal lengths,

carding sa-id'waste material, immersing said 'wa'stemate'rial in boiling water, drying said waste material and subsequently recarding said waste material for the purpose set forth.

'2. A process for treating crape waste material which comprises running said waste through a waste opening machine to break up the threads into substantially equal lengths, cutting said lengths into short fragments, carding said waste-material, immers ing saidwaste material in boiling water, drying said waste material and subsequently recarding said Waste material for the purpose set forth.

3. A process for treating crape Waste 'ma terial which comprises running said waste through a waste opening machine'to'break up the threads into substantially equal lengths, carding said waste material, cutting said lengths into short fragments, immersing said waste material in boiling water, drying said waste material and subsequently recarding said waste material for the purpose set forth.

4. A process for treating crape waste material which comprises running said waste through a waste opening'machine to break up the threads into substantially equal-lengths, carding said waste material, cutting said lengths into short fragments, carding the short fragments, immersing said waste material in boiling water, drying said waste ma terial and subsequentlyrecardingsaid waste material for the purpose set forth.

5. A process for treating crape wastematerial which comprises running said Waste through a waste opening machineto breakup the threads into substantially equal "lengths, carding said waste material, immersingsaid waste material in a solution of boilingwater and soap, drying said waste material and subsequently recarding said waste materialfor the purpose'set forth.

6. A process for treating crape'waste'material which comprises running "said waste through a waste opening machine to break up the threads into substantially equal lengths, cutting said lengths into short fragments, carding said waste material,immersing said waste material in a solution of boiling water and soap, drying said waste material and sub sequently recarding saidv waste material *for the purpose set forthr 7. A process for treating crape waste material which comprises running said waste through a waste opening. machine to break up ,rial which comprises running'said waste through a waste opening machine to break up the threads into substantially equal lengths, carding said waste materiaLcuttiII-g the threads into substantially equal lengths,

said lengths into short fragments, carding the short fragments, immersing said Waste material in a solution of boiling water and soap, drying said waste material and subsequently recarding said waste material for the purpose set forth.

9. A process for treating crape waste material which comprises running said waste through a waste opening machine to break up the threads into substantially equal lengths, carding said waste material, immersing said waste material in boiling water for a period of from 30 to 40 minutes, drying said waste material and subsequently recarding said waste material for the purpose set forth. 1

10. A process for treating crape waste ma terial which comprises running said waste through a waste opening machine to break up the threads into substantially equal lengths, cutting said lengths into short fragments, carding said waste material, immersing said waste material in boiling water for a period of from 30 to 40 minutes, drying said waste material and subsequently recarding said waste material for the purpose set forth.

11. A process for treating crape waste material which comprises running, said waste through a waste opening machine to break up the threads into substantially equal lengths, carding said waste material, cutting said lengths into short fragments, immersing said waste material in boiling water for a period of from 30 to 40 minutes, drying said waste material and subsequently recarding said Waste material for the purpose set forth.

12. A process for treating crape waste material which comprises running said waste through a waste opening machine to break up the threads into substantially equal lengths, carding said waste material, cutting said lengths into short fragments, carding the short fragments, immersing said waste material in boiling water for a period of from 30 to 40 minutes, drying said waste material and subsequently recarding said waste material for the purpose set forth.

13. A process for treating crape waste material which comprises running said waste through a Waste opening machine to break up the threads into substantially equal lengths, carding said waste material, immersing said waste material in a solution of boiling water and soap for a period of from 30 to 40 minutes, drying said waste material and subsequently recarding said waste material for the purpose set forth.

1a. A process for treating crape waste material which comprises running said waste through a waste opening machine to break up the threads into substantially equal lengths, cutting said lengths into short fragments. carding said waste material, immersing said waste material in a solution of boiling water and soap for a period of from 30 to 40 minutes, drying said waste material and subsequently recarding said waste material for the purpose set forth.

15. A process for treating crape Waste material which comprises running said waste through a waste opening machine to break up the threads into substantially equal lengths. carding said. waste material, cutting said lengths into short fragments, immersing said waste material in a solution of boiling water and soap for a period of from 30 to 40 minutes, drying said'waste material and subsequently recarding said Waste material for the purpose set forth.

16. A process for treating crape waste material which comprises running said waste through a waste opening machine to break up the threads into substantially equal lengths, carding said waste material, cutting said lengths into short fragments, carding the short fragments, immersingv said'waste material in a solution of boiling water and soap In testimony whereof I have signed this 1 specification.

GEORGES BONNARD.

for a period of from 30 to 40 minutes, drying 

